From nobody Tue Dec 16 11:46:19 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A7D13C4167B for ; Thu, 30 Nov 2023 04:07:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344452AbjK3EHQ (ORCPT ); Wed, 29 Nov 2023 23:07:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47718 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344423AbjK3EHJ (ORCPT ); Wed, 29 Nov 2023 23:07:09 -0500 Received: from m15.mail.163.com (m15.mail.163.com [45.254.50.220]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 18C9A98; Wed, 29 Nov 2023 20:07:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id; bh=Osv7Sj7KBzk0d0IQpU d2ITh5un8u4/k8C4CnlTjBGhQ=; b=KPak5qleSNGV4u4TydU3I2oZNb5+zRY66+ ffkJ6EGmhd6cOHxe6O2OkFqI8Cx2NrmkrhPjr3K68imZcUiEe9jVDwMmBjHNbJQ2 yVy0AuSot26bt5VDxQho400l0x9pgQ8NoBiQWPpQEtUccJ/id+ZinRRvXANh9/ta 1/mOLvkKs= Received: from localhost.localdomain (unknown [39.144.190.126]) by zwqz-smtp-mta-g0-3 (Coremail) with SMTP id _____wD3vh1UCmhl87xBEQ--.48084S2; Thu, 30 Nov 2023 12:06:45 +0800 (CST) From: Haoran Liu To: tsbogend@alpha.franken.de Cc: fancer.lancer@gmail.com, tglx@linutronix.de, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, Haoran Liu Subject: [PATCH] [irqchip] mips-cpu: Add error handling in mips_cpu_register_ipi_domain Date: Wed, 29 Nov 2023 20:06:42 -0800 Message-Id: <20231130040642.36133-1-liuhaoran14@163.com> X-Mailer: git-send-email 2.17.1 X-CM-TRANSID: _____wD3vh1UCmhl87xBEQ--.48084S2 X-Coremail-Antispam: 1Uf129KBjvdXoW7Jr45uF13KrW5KF13ZF1fJFb_yoWkJFgE9a 4FyF93GF18Kr1DtF4xCrsIqr9aqrykWrnYgr92q3WYyrWavw1kG34avr4Sqr1xWFWIyF1x Ja15Cw1SyF17ZjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sR_GQ6DUUUUU== X-Originating-IP: [39.144.190.126] X-CM-SenderInfo: xolxxtxrud0iqu6rljoofrz/1tbiwhw4glc662x+5gABsX Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This patch enhances the mips_cpu_register_ipi_domain function in drivers/irqchip/irq-mips-cpu.c by adding error handling for the kzalloc call. Previously, the function lacked proper handling for kzalloc failures, which could lead to potential null pointer dereference issues under low memory conditions. Signed-off-by: Haoran Liu --- drivers/irqchip/irq-mips-cpu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/irqchip/irq-mips-cpu.c b/drivers/irqchip/irq-mips-cpu.c index 0c7ae71a0af0..a8030c2b135c 100644 --- a/drivers/irqchip/irq-mips-cpu.c +++ b/drivers/irqchip/irq-mips-cpu.c @@ -238,6 +238,9 @@ static void mips_cpu_register_ipi_domain(struct device_= node *of_node) struct cpu_ipi_domain_state *ipi_domain_state; =20 ipi_domain_state =3D kzalloc(sizeof(*ipi_domain_state), GFP_KERNEL); + if (!ipi_domain_state) + panic("Failed to allocate MIPS CPU IPI domain state"); + ipi_domain =3D irq_domain_add_hierarchy(irq_domain, IRQ_DOMAIN_FLAG_IPI_SINGLE, 2, of_node, --=20 2.17.1